iOS 从 subview 访问父 View 元素

Question

我有一个 ViewController1.h/m 和 SettingsViewController.h/m。在 ViewController1.m 中我有这个:

ViewController1.h
@property (nonatomic, weak) UIView *settingsView;

ViewController1.m

//alloc init _settingsView
SVC = [[SettingsViewController alloc]init];
[self addChildViewController:SVC];
SVC.view.frame = self.view.bounds;
[_settingsView addSubview:SVC.view];
[SVC didMoveToParentViewController:self];

添加设置时，我不会从父 View 中删除 ViewController1。当我用按钮切换设置 View 时，它就在侧面并滑入。在 SettingsViewController 内部，我有一个表，在一行中单击我想将 SettingsViewController 滑回屏幕并从 ViewController1 执行选择器......这就是我现在的问题所在。这是我尝试做的事情:

SettingsViewController.m

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    if (indexPath.section == 0) {
        ViewController1 *VC1 = [[ViewController1 alloc]init];
        [VC1.settingsView setFrame:CGRectMake(320, 0, VC1.view.frame.size.width, VC1.view.frame.size.height)];
        //NSLog(@"%f", VC1.settingsView.center.x);
        //tried:
        //[VC1 performSelector:@selector(...)]; I have the method declared in VC1.h
    }
}

记录 VC1.settingsView.center.x 总是给我 0...而它应该是 160。在运行 performSelector 时在 VC1 方法中添加一个日志语句 DOES日志，但该方法的其余部分不会运行，不会将 SettingsViewController 滑出屏幕。难道是我不懂亲子关系？？？

Answer 1

废话，经过数小时的尝试找到了答案... thanks to this

if([self.parentViewController isKindOfClass:[SomeViewController class]]) {
    SomeViewController* viewController = (SomeViewController*)self.parentViewController;
    [viewController foo];
}